Reconnect the negative cable, being careful as you go.

Hold it to the side for a minute or more.

Make sure to keep the negative battery cable secure after it’s removed, so it doesn’t touch the other terminal or create sparks.

To remove the cable, loosen the nut with a wrench before pulling the negative connector away from the battery.

Locate the negative terminal, which usually has a black cap and a negative/minus symbol on top.

Kill the ignition, and put on safety gear.

Your next test involves disconnecting the negative battery cable and forcing your electronic systems (and your in-vehicle diagnostics) to perform a hard reset.

If this doesn’t work, it’s not necessarily proof that there’s a deeper problem at play. Let the engine sit quietly for two to three seconds, and then repeat the whole process two more times. Start the car, let it run for one second, and then turn it off. On some models, turning the car on and off several times may be enough to do the trick. So, you’re certain that you need to know how to reset a check engine light at home.

Reset A Check Engine Light: Two Techniques If your check engine light comes on again after you’ve performed a manual reset, you’re definitely due for a trip to our service center. Although you may find a Chevrolet diagnostic tool available for sale, most drivers will want to talk to an expert before making any moves on their own. If the gas cap isn’t the problem, don’t try to reset your check engine light until you’ve had the problem looked at. If your check engine light comes on at the same time that you start to experience another problem–like an overheating vehicle–it’s best to pull over as soon as possible. If your check engine light goes off automatically, it was just picking up the fumes from your gas tank. Stop the car, remove the cap, retighten it, and then drive around for a few miles. Many of us have had experiences where the check engine light had come on, but the problem was just an improperly-sealed gas cap. Schedule Service If There Is A Problem, Have It Resolved (And Check Your Gas Cap!)

Service tool version 3400 engine